Sidelink communication method and apparatus

Abstract

The present application provides a sidelink communication method and apparatus. The method includes: performing, by a terminal device, channel monitoring on shared spectrum; and if the result of the channel monitoring is that a channel is idle, starting, by the terminal device, transmission of a first sidelink channel at a first time domain position, where the first time domain position is one or more of the following: a time domain position indicated by first indication information; and a time domain position determined based on a first time unit, the first time unit being smaller than one slot.

What is claimed is: 
     
       1. A sidelink communication method, comprising:
 performing, by a terminal device, channel monitoring on shared spectrum; and 
 when the terminal device determines that a result of the channel monitoring is that a channel is idle, determining, by the terminal device, a first time domain position to transmit a first sidelink signal over a first sidelink channel, wherein the first time domain position represents a starting time position of a first time unit in a time period, wherein the time period has two symbols, the time period is divided into a plurality of time units including the first time unit, wherein a duration of each of the plurality of time units is a first value or an integer multiple of the first value, the first value is 25 microseconds, and the first time domain position is determined based on one or more of the following information:
 a specified time; or 
 a time of the channel monitoring; and 
 
 starting, by the terminal device, transmission of the first sidelink signal over the first sidelink channel at the first time domain position. 
 
     
     
       2. The method according to  claim 1 , wherein the specified time is indicated by a control signaling. 
     
     
       3. A sidelink communication apparatus, comprising:
 at least one memory; and 
 at least one processor coupled to the at least one memory and individually or collectively configured to perform operations comprising: 
 performing, by a terminal device, channel monitoring on shared spectrum; 
 when the terminal device determines that a result of the channel monitoring is that a channel is idle, determining, by the terminal device, a first time domain position to transmit a first sidelink signal over a first sidelink channel, wherein the first time domain position represents a starting time position of a first time unit in a time period, wherein the time period has two symbols, the time period is divided into a plurality of time units including the first time unit, wherein a duration of each of the plurality of time units is a first value or an integer multiple of the first value, the first value is 25 microseconds, and the first time domain position is determined based on one or more of the following information:
 a specified time; or 
 a time of the channel monitoring; and 
 
 starting, by the terminal device, transmission of the first sidelink signal over the first sidelink channel at the first time domain position. 
 
     
     
       4. The apparatus according to  claim 3 , wherein the specified time is indicated by a control signaling. 
     
     
       5. One or more non-transitory computer-readable media storing computer instructions, that when executed by one or more processors, cause a computing device to perform operations comprising:
 performing channel monitoring on shared spectrum; and 
 when determining that a result of the channel monitoring is that a channel is idle, determining, a first time domain position to transmit a first sidelink signal over a first sidelink channel, wherein the first time domain position represents a starting time position of a first time unit in a time period, wherein the time period has two symbols, the time period is divided into a plurality of time units including the first time unit, wherein a duration of each of the plurality of time units is a first value or an integer multiple of the first value, the first value is 25 microseconds each of the plurality of time units is smaller than a symbol duration, and the first time domain position is determined based on one or more of the following information:
 a specified time; or 
 a time of the channel monitoring; and 
 
 starting transmission of the first sidelink signal over the first sidelink channel at the first time domain position. 
 
     
     
       6. The one or more non-transitory computer-readable media according to  claim 5 , wherein the specified time is indicated by a control signaling.